from his father that the Messenger of Allah ﷺ said: "Whoever starts a good tradition which is followed, then for him is a reward, and the likes of their rewards of whoever follows him, there being nothing diminished from their rewards. And whoever starts a bad tradition which is followed, then for him is the sin, and the likes of the sins of whoever follows him, there being nothing diminished from their sins."  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ سَنَّ سُنَّةَ خَيْرٍ فَاتُّبِعَ عَلَيْهَا فَلَهُ أَجْرُهُ وَمِثْلُ أُجُورِ مَنِ اتَّبَعَهُ غَيْرَ مَنْقُوصٍ مِنْ أُجُورِهِمْ شَيْئًا وَمَنْ سَنَّ سُنَّةَ شَرٍّ فَاتُّبِعَ عَلَيْهَا كَانَ عَلَيْهِ وِزْرُهُ وَمِثْلُ أَوْزَارِ مَنِ اتَّبَعَهُ غَيْرَ مَنْقُوصٍ مِنْ أَوْزَارِهِمْ شَيْئًا وَفِي الْبَابِ عَنْ حُذَيْفَةَ  

"The Messenger of Allah said: 'Whoever introduces a good practice that is followed after him, will have a reward for that and the equivalent of their reward, without that detracting from their reward in the slightest. Whoever introduces an evil practice that is followed after him, will bear the burden of sin for that and the equivalent of their burden of sin, without that detracting from their burden in the slightest.'"  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ سَنَّ سُنَّةً حَسَنَةً فَعُمِلَ بِهَا بَعْدَهُ كَانَ لَهُ أَجْرُهَا وَمِثْلُ أُجُورِهِمْ مِنْ غَيْرِ أَنْ يَنْقُصَ مِنْ أُجُورِهِمْ شَيْئًا وَمَنْ سَنَّ سُنَّةً سَيِّئَةً فَعُمِلَ بِهَا بَعْدَهُ كَانَ عَلَيْهِ وِزْرُهُ وَمِثْلُ أَوْزَارِهِمْ مِنْ غَيْرِ أَنْ يَنْقُصَ مِنْ أَوْزَارِهِمْ شَيْئًا  

Yahya related to me from Malik that he had heard that the Messenger of Allah ﷺ said, "No one calls to guidance without having the same reward as those who follow him without diminishing their rewards at all. And no one calls to error without having the same burdens as they do without diminishing their burdens at all."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مَا مِنْ دَاعٍ يَدْعُو إِلَى هُدًى إِلاَّ كَانَ لَهُ مِثْلُ أَجْرِ مَنِ اتَّبَعَهُ لاَ يَنْقُصُ ذَلِكَ مِنْ أُجُورِهِمْ شَيْئًا وَمَا مِنْ دَاعٍ يَدْعُو إِلَى ضَلاَلَةٍ إِلاَّ كَانَ عَلَيْهِ مِثْلُ أَوْزَارِهِمْ لاَ يَنْقُصُ ذَلِكَ مِنْ أَوْزَارِهِمْ شَيْئًا  

"The Messenger of Allah said: 'Whoever introduces a good practice that is followed, he will receive its reward and a reward equivalent to that of those who follow it, without that detracting from their reward in their slightest. And whoever introduces a bad practice that is followed, he will receive its sin and a burden of sin equivalent to that of those who follow it, without that detracting from their burden in the slightest.'" (Using translation from Ibn Mājah 203)   

قَالَ رَسُولُ اللَّهِ ﷺ «مَنْ سَنَّ سُنَّةً حَسَنَةً عُمِلَ بِهَا بَعْدَهُ كَانَ لَهُ مِثْلُ أَجْرِ مَنْ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يُنْقَصَ مِنْ أَجْرِهِ شَيْءٌ وَمَنْ سَنَّ سُنَّةً سَيِّئَةً كَانَ عَلَيْهِ مِثْلُ وِزْرِ مَنْ يعَمِلَ بِهَا مِنْ غَيْرِ أَنْ يُنْقَصَ مِنْ أَوْزَارِهِم شَيْءٌ»  

[Machine] Read to him, and say to him, how did you hear the Prophet ﷺ say, "Whoever starts a good practice in Islam, will have the reward for it, and the reward of all who practice it, without anything being reduced from their rewards. And whoever starts an evil practice in Islam, will have the sin of it, and the sin of all who practice it, without anything being reduced from their sins."  

اقْرَأْ عَلَيْهِ السَّلَامَ وَقُلْ لَهُ كَيْفَ سَمِعْتَ النَّبِيَّ ﷺ يَقُولُ «مَنْ سَنَّ سُنَّةً صَالِحَةً فَاتُّبِعَ فِيهَا وَعُمِلَ بِهَا» قَالَ فَأَتَيْتُهُ وَسَأَلْتُهُ فَقَالَ «لَهُ مِثْلُ أَجْرِ كُلِّ رَجُلٍ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يَنْقُصَ مِنْ أُجُورِهِمْ شَيْءٌ وَمَنْ سَنَّ سُنَّةً سَيِّئَةً فَاتُّبِعَ فِيهَا وَعُمِلَ بِهَا كَانَ عَلَيْهِ مِثْلُ إِثْمِ كُلِّ رَجُلٍ عَمِلَ بِهَا مِنْ غَيْرِ أَنْ يَنْقُصَ مِنْ إِثْمِهِمْ شَيْءٌ»  

"مَنْ سَنَّ في الإِسْلامِ خَيرًا فَاسْتُنَّ بهِ كَانَ لَهُ أَجْرُهُ وَمِثْلُ أُجُورِ مَنْ تَبعَه من غير أَنْ يَنْقُصَ مِن أُجُورهم شَيئًا، ومَن سَنَّ شَرّا (*) فَاسْتُنَّ بِهِ كَانَ عَلَيهِ وزْرُه وَمِثْلُ أَوْزَار مَن تَبعَه مِن غَير أَنْ يَنْقُصَ مِن أَوْزَارهم شَيئًا".  

"مَنْ سَنَّ سُنَّةً حَسَنَةً عُمِلَ بها بَعْدَهُ كَانَ لَه أَجْرُهُ وَمِثْلُ أُجُورِهم مِنْ غَيرِ أَن يَنْتَقِصَ مِنْ أُجُورِهِمْ شَيئًا، وَمَنْ سَنَ سُنَّةً سيِّئَةً فَعُمِلَ بِهَا بَعْدَهُ كَانَ عَلَيهِ وزْرُهَا وَمِثَلُ أَوْزَارِهمْ مِنْ غَيرِ أَنْ يَنْتَقِصَ مِنْ أَوْزَارِهِمْ شَيئًا".  

"مَنْ سَنَّ سُنَّةَ هُدًى فَاتُّبِعَ عَلَيهَا كَانَ لَهُ أَجْرُهَا وَأَجْرُ مَنْ عَمِلَ بهَا مِنْ غَيرِ أَنْ يَنْقُصَ مِنْ أُجُورِهم شَيئًا، ومن سَنَّ سُنَّةَ ضَلالةٍ فَاتُّبِعَ عَلَيهَا كَانَ عَلَيهِ مِثْلُ أَوزَارِهم مِن غَيرِ أَنْ يَنْقُصَ مِن أَوْزَارِهم شَيئًا".